Apparatus for trimming molded articles



July 24, 1951 E. T. GADD APPARATUS FOR TRIMMING MOLDED ARTICLES 3 Sheets-Sheet 1 Filed NOV. 50, 1948 INVENTOR. Edward 2'' G00! TTORNEYS July 24, 1951 DD 2,561,356

APPARATUS FOR TRIMMING MOLDED ARTICLES Filed Nov. 30, 1948 3 Sheets-Sheet 2 FIG. 3

INVENTOR Z/war/Za/a TTORNEYS July 24, 1951 E. T. GADD 2,561,356

APPARATUS FOR TRIMMING MOLDED ARTICLES Filed Nov. 30, 1948 3 Sheets-Sheet 5 FIG. 6 4\ FIG. 7 20 INVENTOR Ida/era Z 0214 ATTORNEYS Patented July 24, 1951 UNIT Ea STATES PATENT APPKRKTUSTGR TRIMMING'MOLDED' ARTICLES EdwardE. Gadd, Brooklyn, N. Y.,- ass-ignor-of=one-- halftoTheodore-B. Mi'ckelson, Brooklyn, .N.

Application November 30, 1 948. SeriaI No. 62,6 12

4 Claims (01. 16429) invention:relaltesiocanapparatusior (male molded anticies:;whiel1is.suitabie..for

. this; flow operation;v itiaims to... improve the apparatusmsed;in.sthis;.operation a: view. to accomplishing: result:.more eiiiciently and economically- The: nature; of. the: .appazratus-.1..ot the. present will.:bev-evident:irom.thefollowing: de;-.

scrlpticin.v and; accompanying, drawings which illustrate alspeciiieembodiment'oixaniapparatus falling withinthebroad scope of the present invention.

In the drawings.

Fig. 1 represents a plan or top view of the apparatus;

Fig. 2 represents a side view thereof,

Fig. 3 representsaplanortop.viewof a portion of the apparatus showing details not shown in Fig. 1;: 1

- Fig; 4 ;representscasectionalong thed ine 4-4 of Fig; 3;;

Fig. 5 represents asection: taken along the line 5-5 of Fig. 3;

Fig.- G- representsa plan er topview oi the' apparatus with aheel imposition ready to" be trimmed;

Fig. 7 represents a section along the line 55 of Fig. 6; and

Fig. 8 represents a typical rubber heel before the flow has been removed.

In the drawings, the numeral I represents a mounting or bolster plate, a rectangular plate to which the working or moving parts of the apparatus are attached. The parts numbered 2 and 3 are die blocks, those numbered 2 being pivoted on the studs 4 and being guided in their radial motion by the studs 5. The inward radial motion of the die blocks 2 is imparted to them by the 2 camming actionofsdie block: 3;; Thedie' block? moves; linear1y, .guidedl the studs; 6 and 1 has angular faces I which.impart the inward radial motionto thedie-blocksl;

Eachoi; the three: die blocks:- is. dovetailed as shown, and has a locking device 8 to holda'the filler blocks 9 and II] in their proper positions. Thesefiller blocks are. dovetailed as shown to fit the corresponding. dovetails oi the-corresponding die blocks, and are removabl'e'in order that filler blocks; of other sizes may be" inserted.

The numeral l. I represents a flexible knife blade rigidly attached to the filler biocksfi... the blade assuming a U-shapewhen the filler blocks, 9 are dovetailed into thepivoted'die blocks. The numeral I 2 representsa breastknifebladeattached to the filler block ID.

The apparatus shown in the" drawings also comprises a rand plate -lc3 ,1.apiece-of metal coniforming. to the shape-and design of the randot any specific designpor size'of heel; A rand-filler plate I4, a. piece'ofr metal a1so:coniorming .towthe shape of any specific-design or size oi. heel is also provided. The thickness of the rand'filler piatemayyvary, so as torraise or lower the rand plate=-in'the'app.aratus in order heels-of various thicknessescmay be accommodated;

The numerals] 5 I represent toggles pivoted upon thew-die block13 means or the studs I6 and upontheerod's; H by meansofthe studs- I8 The rods I l are providedwith dependingcam rollers 2 3 which impart a: reciprocating-motion: thereto, the rods. being guided. such motion-by. the hearings or: sleeves l9.- attached to the bolsterplate I. The rollers 231 are movedbycontacting; the fixed. cams-Hand 25, the formercams serving to move the rollers inward and. the latter serving; to movethe rollers outward. Also,-the. cams Mare sopositionedthart they serve to: move the toggles l-fir-inw-ardly slightly past the position-of their maximum forward thrust upon the die-block 3 .(i. e., slightly. past theHTdea d-center position), so that after the rollers 23 have completed their contact with the cams 24 the blades II and I2 will automatically remain in their closed positions until the roller 23 contact the fixed cams 25.

The bolster plate I is carried by the endless chains 26, and is attached thereto by suitable means such as the pins 29. These chains are mounted upon sprockets 21, which are driven by suitable means 28.

The apparatus is also provided with rollers 20 and 2 I, suitabl made of steel.

The operation of the apparatus shown is as follows: An untrimmed heel 22 is positioned upon th rand plate when the U-shaped knife blade is in its extended position and when the rods I! are in their outward positions. As the bolster plate is carried forward by the chains 26, the rollers 23 contact the fixed cams 24, causing the knife blades to grip the heel firmly. The bolster plate is then carried between the rollers 20 and 2 I, the former serving to remove the flow and the latter serving to support the bolster plate. As the bolster plate then proceeds in its forward motion, the rollers 23 contact the fixed cams 25, which move the rollers 23 away from each other, thus blade and pivotally mounted on said plate, a second die block rigidly fixed to the other leg of said flexible knife blade and pivotally mounted on said releasing the heel, so that it may fall from the apparatus as the bolster plate passes over the sprockets. If desired, brushing means may be provided intermediate the rollers 20 and 2| and the fixed earns 25 to sweep the cutting to the side of the device before the heel has been released.

Such brushing means may comprise a. brush 30 mounted on shaft 3| on which is also mounted the pulley 32. Belt 33 passes over pulley 32 and alsoover pulley 34 which is mounted on shaft 35, This shaft also has mounted on it sprocket 36 which is driven by one of the chains 26, thereby providing the power necessary to operate the brush.

I claim:

1. A die suitable for use in removing the flow from rubber or plastic heels comprising a mounting plate, a flexible knife blade conforming to the U-shaped portion of a heel, a first die block rigidly fixed to one leg of said flexible knife blade and pivotally mounted on said plate, a second die block rigidly fixed to the other leg of said flexible knife blade and pivotally mounted on said plate, a breast knife blade conforming to the breast portion of a heel, a breast die block rigidly fixed to said breast knife blade and slidably mounted on said plate, a pair of angular faces on said breast die block for pivoting-said first and second die blocks towards each other upon movement into engagement therewith to form a flow cutting blade, and means for imparting reciprocating motion to said'breast die block.

2. An apparatus suitable for use in removing the flow from rubber or plastic heels comprising a mounting plate, a flexible knife blade conforming 'to the U-shaped portion of a heel, a first die block rigidly fixed to one leg of said flexible knife blade and pivotally mounted on said plate, a second die block rigidly fixed to the other leg of said flexible knife blade and pivotally mounted on said plate, a breast knife blade conforming to the breast portion of a heel, a breast die block rigidly fixed to said breast knife blade and slidably mounted on said plate, a pair of angular faces on said breast die block for pivoting said first and second die blocks towards each other upon movement into engagement therewith to form a flow cutting blade, conveying means connected to said plate for moving said plate, fixed means disposed in the path of travel of said plate, and means conplate, a breast knife blade conforming to the breast portion of a heel, a breast die block rigidly fixed to said breast knife blade and slidably mounted on said plate, a pair of angular faces on said breast die block for pivoting said first and second die blocks towards each other upon movement into engagement therewith to form a flow cutting blade, endless chain conveying means connected to said plate for moving said plate, fixed cams disposed in the path of travel of said plate, and roller means connected to said breast die block for imparting reciprocating motion thereto upon movement into engagement with said fixed cams by said conveying means.

4. An apparatus suitable for use in removing the flow from rubber or plastic heels comprising a mounting plate, a flexible knife blade conforming to the U-shaped portion of a heel, a first die block rigidly fixed to one leg of said flexible knife blade and pivotally mounted on said plate, a second die block rigidly fixed to the other leg of said flexible knife blade and pivotally mounted on said plate, a breast knife blade conforming to the breast portion of a heel, a breast die block rigidly fixed tosaid breast knife blade and slidably mounted on said plate, a pair of. angular faces on said breast die block for pivoting saidfirst and second die blocks towards each other upon movement into engagement therewith to form a flow cutting blade, rods slidably mounted on said plate, toggles operatively interconnecting said rods with said breast die block, rollers attached to said rods, a pair of endless chains connected to said plate for moving said plate, and fixed cams positioned for operative engagement with said rollers to impart reciprocating motion to said breast die block.

EDWARD T. GADD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 6,444 Boynton May 8, 1849 13,296 Arthur et a1 July 24, 1855 472,7 15 Rogouski Apr. 12, 1892 1,167,976 Campbell Jan. 11, 1916 2,101,654 Sheehan Dec. 7,1937

I Evers Aug. 8, 1939 

